I'm in a bit of a rush at the moment, so I'll just list two main things I've noticed.

Bar visibility is very bad even on full opacity. With the default backdrop, I cannot tell the difference between the bar line, or its backdrop. A solution to this might be to introduce a perfectly plain texture for the bars instead of the gradated one now that blackens its centre. I have also tried using a custom texture to no avail, though i might be doing it wrong. I created a 15x15 32-bit .tga file, uncompressed, and tried linking the file name, as well as its directory string.

Another thing that might not be complete are the combo point icons. I had them disabled from the start when they wouldn't show up and went back to the text representation like that of the old hud. I have been unable to recreate this selection in any case. Creating an icon box for target only reaps a drop down menu of combat, raid icon, and PvP Flag.

I rather miss the portraits too, and Daportrait doesn't have a head-only option. But it's being worked on, if I understand correctly. Otherwise, it's great all in all. lighter and with better reponses than the old version.